Defective pro mini and the solution

[fleinze]

Hi!
I had a pro mini which stopped working with the following symptoms:

• No communication
• not even a flicker on Pin 13 LED
• not responding to programming attempts, not even with ISP.
• RST pin has a voltage of ca. 100mV

The pro mini started working again without me doing anything and then after a few months stopped working again.

After a lot of soldering (replacing most components including the atmega) it turned out that the board had a ca. 100 Ohm short between RST and GND...

So if you experience the above symptoms just measure resistance between RST and GND.

[mfalkvidd]

@fleinze interesting experience. Thanks for sharing.